A recap of PHP for database queries, based on: https://www.w3schools.com/php/php_mysql_select.asp

basicSelect.php

<?php
$servername = "localhost";
$username = "";
$password = "";
$dbname = "";

function drawRow($row){
	?>
		<article>
		<h2><?php echo $row["id"]. " " . $row["name"]?></h2>
		<p>Count <?php echo $row["count"] ?></p>
		<input type="checkbox" <?php if($row["truthy"]) { echo "checked"; } ?> >
		</article>
		<?php
}

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
	die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT id, name, count, truthy FROM testTable";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
	// output data of each row
	while($row = $result->fetch_assoc()) {
		drawRow($row);
	}
} else {
	echo "0 results";
}
$conn->close();
?>

preparedSelect.php

<?php
$servername = "localhost";
$username = "";
$password = "";
$dbname = "";

function drawRow($row){
	?>
		<article>
		<h2><?php echo $row["id"]. " " . $row["name"]?></h2>
		<p>Count <?php echo $row["count"] ?></p>
		<input type="checkbox" <?php if($row["truthy"]) { echo "checked"; } ?> >
		</article>
		<?php
}

try {
	$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
	$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
	$stmt = $conn->prepare("SELECT id, name, count, truthy FROM testTable");
	$stmt->execute();

	// set the resulting array to associative
	$result = $stmt->setFetchMode(PDO::FETCH_ASSOC);
	$data = $stmt->fetchAll();
	foreach($data as $k=>$v) {
		drawRow($v);
	}
} catch(PDOException $e) {
	echo "Error: " . $e->getMessage();
}
$conn = null;
?>